move from Godeps to vndr

This uses the standard go vendor location instead of old Godeps
location.

Also remove usage of symlink GOPATH. Since our README mentions that you
should build it inside GOPATH, i think its a reasonable to assume that
you dont need to create a tmp GOPATH.

Signed-off-by: Daniel Dao <dqminh89@gmail.com>

vendor/github.com/docker/go-units/size.go

@@ -0,0 +1,95 @@
+package units
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+// See: http://en.wikipedia.org/wiki/Binary_prefix
+const (
+	// Decimal
+
+	KB = 1000
+	MB = 1000 * KB
+	GB = 1000 * MB
+	TB = 1000 * GB
+	PB = 1000 * TB
+
+	// Binary
+
+	KiB = 1024
+	MiB = 1024 * KiB
+	GiB = 1024 * MiB
+	TiB = 1024 * GiB
+	PiB = 1024 * TiB
+)
+
+type unitMap map[string]int64
+
+var (
+	decimalMap = unitMap{"k": KB, "m": MB, "g": GB, "t": TB, "p": PB}
+	binaryMap  = unitMap{"k": KiB, "m": MiB, "g": GiB, "t": TiB, "p": PiB}
+	sizeRegex  = regexp.MustCompile(`^(\d+)([kKmMgGtTpP])?[bB]?$`)
+)
+
+var decimapAbbrs = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
+var binaryAbbrs = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}
+
+// CustomSize returns a human-readable approximation of a size
+// using custom format.
+func CustomSize(format string, size float64, base float64, _map []string) string {
+	i := 0
+	for size >= base {
+		size = size / base
+		i++
+	}
+	return fmt.Sprintf(format, size, _map[i])
+}
+
+// HumanSize returns a human-readable approximation of a size
+// capped at 4 valid numbers (eg. "2.746 MB", "796 KB").
+func HumanSize(size float64) string {
+	return CustomSize("%.4g %s", size, 1000.0, decimapAbbrs)
+}
+
+// BytesSize returns a human-readable size in bytes, kibibytes,
+// mebibytes, gibibytes, or tebibytes (eg. "44kiB", "17MiB").
+func BytesSize(size float64) string {
+	return CustomSize("%.4g %s", size, 1024.0, binaryAbbrs)
+}
+
+// FromHumanSize returns an integer from a human-readable specification of a
+// size using SI standard (eg. "44kB", "17MB").
+func FromHumanSize(size string) (int64, error) {
+	return parseSize(size, decimalMap)
+}
+
+// RAMInBytes parses a human-readable string representing an amount of RAM
+// in bytes, kibibytes, mebibytes, gibibytes, or tebibytes and
+// returns the number of bytes, or -1 if the string is unparseable.
+// Units are case-insensitive, and the 'b' suffix is optional.
+func RAMInBytes(size string) (int64, error) {
+	return parseSize(size, binaryMap)
+}
+
+// Parses the human-readable size string into the amount it represents.
+func parseSize(sizeStr string, uMap unitMap) (int64, error) {
+	matches := sizeRegex.FindStringSubmatch(sizeStr)
+	if len(matches) != 3 {
+		return -1, fmt.Errorf("invalid size: '%s'", sizeStr)
+	}
+
+	size, err := strconv.ParseInt(matches[1], 10, 0)
+	if err != nil {
+		return -1, err
+	}
+
+	unitPrefix := strings.ToLower(matches[2])
+	if mul, ok := uMap[unitPrefix]; ok {
+		size *= mul
+	}
+
+	return size, nil
+}